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        <p><font face="helvetica, arial">This algorithm reduces the density of a given trajectory, i.e. the count of features will be reduced. The original trajectory will not be changed, but the results will be stored in a new layer.</font></p>
        <h4><font face="helvetica, arial">Trajectory Layer:</font></h4>
        <p><font size=3 face="helvetica, arial">This combobox shows all layers of the current QGIS project with the geometry type POINT. A layer with trajectory data should be selected.</font></p>
        <h4><font face="helvetica, arial">Keep the last feature of the trajectory:</font></h4>
        <p><font size=3 face="helvetica, arial">A checkbox to indicate, whether the algorithm keeps the last feature of the trajectory, regardless of the distance to the last feature.</font></p>
        <h4><font face="helvetica, arial">Minimum distance between two consecutive points:</font></h4>
        <p><font size=3 face="helvetica, arial">The minimum distance between consecutive trajectory points. If the distance to the following point is shorter than the inserted value, the following point will be removed.</font></p>
        <h4><font face="helvetica, arial">Output:</font></h4>
        <p><font size=3 face="helvetica, arial">The destination where the reduced trajectory should be saved.</font></p>
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